Ultimate Super Doom 3

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Ultimate Super Doom 3 (Also known as USD3) is a mod for the original DOOM games by Doomero. The mod's primary purpose is to port weapons and enemies from Doom 3, including weapons and enemies which were present in Doom 3 but not in the original games. Unlike some other mods, Ultimate Super Doom 3 is much more complex, importing not only the weapons and enemies but also much of their behaviour from Doom 3: for instance, the BFG 9000 can be charged to release a more powerful shot.

The PDA is included but its functionality is changed: instead of containing crucial information from several key characters, it instead contains a list of credits. In one of the additional mods the PDA also serves as a satellite video uplink showing certain videos from Doom 3 (such as Sarge's messages to the marine).

Included with the mod is the ability to play Ultimate Doom straight through instead of in episodes.

Pain Elementals do not explode upon death, and they do not release a horde of Forgotten Ones.

The Berserk pickup changes the perspective of the player briefly, as in Doom 3. With this powerup, you cannot change weapon until it wears off. All attacks on enemies while the Berserk powerup is active will kill them in one hit.

Several types of Z-Sec are included: the only one excluded are the Riot Shield Troopers. None of the civilian zombies are included.

An additional mod adds certain cutscenes into Ultimate Doom. This mod can be played in conjunction with, or aside from, the mod allowing the player to play Ultimate Doom as a whole game.

The Soul Cube or the Artifact is available to the player on certain difficulty modes.